Abstract
Abstract The influence of load line displacement on the stress corrosion crack growth behavior of AISI 422 SS in a sodium chloride solution has been investigated. The fatigue precracked specimens were loaded by both constant load and constant displacement. The constant-loaded specimens exhibited a significant stress corrosion crack growth. No crack growth was seen in the wedge-loaded constant displacement specimens after 21,000 h of exposure, even at the maximum stress intensity investigated. This crack growth discrepancy was attributed to the stress intensity drop and crack tip overloading resulting from the load line displacement in the wedge-loaded specimens. The effects of crack tip overloading on crack growth and apparent KISCC are also discussed.
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